In easyPlace mode and tweakAccurateBlockPlacement the repeaters and comparators are placed with a 90 degree incorrect rotation, i.e., they always get 90 degree wrong. When placing dropper, observers and pistons, there is no problem.

placement_test.zip

I encountered the same issue. It might be an issue in carpet-extra; after reading the different implementations of the protocol, I found some differences between QuickCarpet and Carpet-Extra, particularly here:

https://github.com/gnembon/carpet-extra/blob/6e9e9070c09021bd7a7a0ed5b2b8a5871448cf16/src/main/java/carpetextra/utils/BlockPlacer.java#L114

https://github.com/QuickCarpet/QuickCarpet/blob/a4fa62ea870defa74658d74ec2fd46a49c8990f5/src/main/java/quickcarpet/utils/AccurateBlockPlacement.java#L57

Can someone test with QuickCarpet? I'm using Carpet-extra on my server right now.

It looks like it's just the comparators, repeaters and trap doors which have another property as well, like the subtract mode, extra delay, top half trapdoor. So this is the same accurate placement protocol bug that also breaks top half stair placing which was reported a little while ago. I'll need to take a look at the protocol, I think it's currently overlapping some of those other property values into the facing data.

Which version of litematica, minecraft version, singleplayer or server?

These are the mod versions:
tweakeroo-fabric-1.15.2-0.10.0-dev.20200424.222527.jar
minihud-fabric-1.15.2-0.19.0-dev.20200427.222110.jar
malilib-fabric-1.15.2-0.10.0-dev.21+arne.1.jar
litematica-fabric-1.15.2-0.0.0-dev.20200501.214810.jar
itemscroller-fabric-1.15.2-0.15.0-dev.20200212.183513.jar
carpet-extra-1.15.2-1.3.18.jar
fabric-carpet-1.15.2-1.3.21+v200429.jar

Server running carpet mod with the same version as above.